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+--- Thread: [Equipment] Power Requirements (/Thread-Equipment-Power-Requirements)
Power Requirements - mmdupas - 04-20-2015
My PR System One Series 60 says with and 80W power supply it draws 2.0A
Is that with the heated hose and humidifier on high?
If not can anyone give me a feel for how much power it will draw?
Thanks
RE: Power Requirements - Terry - 04-20-2015
(04-20-2015, 09:41 AM)mmdupas Wrote: My PR System One Series 60 says with and 80W power supply it draws 2.0A
Is that with the heated hose and humidifier on high?
If not can anyone give me a feel for how much power it will draw?
Thanks
The input (what it gets from the wall outlet) is a maximum of 130W. It's probably less. The output is what your machine gets to use, and should be less than 80W, with the pressure all the way up and the humidifier on high.
The numbers on the power supply are maximums.
With lower pressure and/or humidity it will use less.
RE: Power Requirements - mmdupas - 04-20-2015
Thanks Terry. I am planning on using my CPAP in an RV with 600 amp batteries. As long as 2.0 A is a maximum all is well.
RE: Power Requirements - justMongo - 04-20-2015
(04-20-2015, 10:50 AM)mmdupas Wrote: Thanks Terry. I am planning on using my CPAP in an RV with 600 amp batteries. As long as 2.0 A is a maximum all is well.
Check your RV again. I think that might be the Cold Cranking Ampere (CCA) rating. Look for the Ampere-Hour (A-Hr) rating. That's the theoretical capacity. The true A-Hr ability is about 2/3 of that. The RV probably has deep cycle batteries...
It's best to have a multi-battery RV with the starting battery isolated from those that supply power to the RV. Else, you can end up stranded.
RE: Power Requirements - archangle - 04-20-2015
(04-20-2015, 09:41 AM)mmdupas Wrote: My PR System One Series 60 says with and 80W power supply it draws 2.0A
Is that with the heated hose and humidifier on high?
If not can anyone give me a feel for how much power it will draw?
Thanks
It's more complicated than that.
The 2 A is the AC power drawn by the power brick. (The power supply built into the power cable between the machine and the AC electrical outlet.)
It's also the maximum rating. It's worst case with everything running, and it's also probably only that high for a short time, maybe only a second or two when it turns on.
My PRS1 machine running 16 cmH2O and with the heated humidifier (no heated hose) averages only around 30 W on the AC side, which is around 1/4 amp.
(04-20-2015, 10:50 AM)mmdupas Wrote: Thanks Terry. I am planning on using my CPAP in an RV with 600 amp batteries. As long as 2.0 A is a maximum all is well.
If it says 600 amp on the battery, that's probably the starting current. You need to know the "Amp Hour" rating for the battery. The starting current (cold cranking amps or CCA) is how much power it can put out in a short period of time. The amp hours is the number you need to figure out how long the battery will run your CPAP before the battery dies.
The 2 A number is for hooking up to 120V AC, not a 12V battery. How do you plan to hook your CPAP up to your RV? Does it supply 120V AC while running on battery power, or do you have some sort of DC power inside the RV?
Without the heated humidifier or heated hose, mine draws about 1 amp average for the night. With the heated humidifier, I get about 3 amps average. I don't have a heated hose.
How long do you expect to be without AC power in your RV?
RE: Power Requirements - mmdupas - 04-20-2015
What's important is you've confirmed the draw is not much. Thanks for that.
The RV has (2) alternators, an inverter and Lithium batteries rated at 600 Ah.
RE: Power Requirements - justMongo - 04-20-2015
(04-20-2015, 03:54 PM)mmdupas Wrote: What's important is you've confirmed the draw is not much. Thanks for that.
The RV has (2) alternators, an inverter and Lithium batteries rated at 600 Ah.
Good, sounds like the RV is isolated from the vehicles starting and charging system.
So, you have 120 VAC in the RV's living area? Sounds like you're good to go.
RE: Power Requirements - archangle - 04-20-2015
(04-20-2015, 03:54 PM)mmdupas Wrote: What's important is you've confirmed the draw is not much. Thanks for that.
The RV has (2) alternators, an inverter and Lithium batteries rated at 600 Ah.
I don't have good numbers for a PRS1 560 with heated hose, but I'm going to guess at about a 50W average AC power draw. Assuming 50% efficiency of your inverter at a 50W draw, that's about 8 Amps on the battery. That's theoretically 75 hours of usage between charges. Unless you plan on parking for a long time without external power or long drives, you're probably in good shape.
RE: Power Requirements - mmdupas - 04-20-2015
Thanks you an angel!